Hot-air furnace, stove, and the like



c. HILLER. HOT AIR FURNACE, STOVE, AND THE LIKE.

APPLICATION FILED MAY 3, I919- 34 34 O Patented May 18, 1920.

2 SHEETSSHEET I.

IVVENTOR.

C. HILLER.

HOT AIR FURNACE, STOVE, AND THE LIKE. APPLICATION FILED MAY 3, 1919.

1,340,340. Patented May 18, 1920.

2 SHEETS-SHEET Z.

r: v r 9 8 7 28 26 2 LVVENTOR.

UNITED STATES PATENT OFFICE.

CHARLES HILLER, OF ST. LOUIS, MISSOURI, ASSIGNOR OF ONE-HALF TO SAMUEL Gr.

STAHLHUTH, OF ST. LOUIS, MISSOURI.

HOT-AIR FURNACE, STOVE, AND THE LIKE.

Specification of Letters Patent.

Patented May 18, 1920.

Application filed May 3, 1919. Serial No. 294,50Q.

T 0 all whom it may concern Be it known that I, CHARLES HILLER, a citizen of the United States, and resident of St. Louis, Missouri, have invented certain new and useful Improvements in Hot-Air Furnaces, Stoves, and the like, of which the following is a specification.

This invention relates to improvements in hot-air furnaces, stoves and the like, and has for its object an inner heating compart- Inent consisting of a sheet of metal bent and shaped to form a plurality of diving fines, a lining placed therein and covering a portion of said fiues and detachable frame shields placed on the top of the shell and against the contacting walls of the diving fiues.

A further object of my invention is to construct a heating apparatus such as hotair furnaces, heating stoves and the like, the same consisting of an inner shell and an outer housing, the inner shell being bent and shaped to form a plurality of diving fiues, a lining placed therein and covering a portion of said flues, detachable frame shields placed on the top of the shells and against the contact walls of the diving fines, a fire box located in said shell and an ashpit below the fire box, the diving fiues being arranged for equally distributing the heat in the entire compartment and for directing the heat downward passing under the base of the inner compartment.

Figure 1, is a horizontal sectional view taken on the line 11 of Fig. 2.

Fig. 2, is a vertical sectional view taken on the line 2-2 of Fig. 1.

Fig. 3, is a side view of my invention with the outer casing removed.

Fig. 4, is a rear perspective view of one of the detachable flame shields made use of.

Fig. 5, is a detail sectional perspective view of the damper mechanism made use of.

In carrying out my invention I provide a heating apparatus constructed of an inner compartment consisting of a wall or shell 6, which is bent, shaped or cast into a plu rality of diving fines and preferably in the number as shown in the illustration.

In order to obtain the proper result of equally distributing the heat I shape the diving flues into various sizes. The flue 7 is the smallest in width, the flue 8 slightly larger and the flue 9 the greatest in width. The depth of the fiues is the same. These flues extend from the top 10 to the bottom 11, the bottom ends of the fines being securely connected to the bottom 11 while the tops are provided with a cover 12, which forms a part of the top 10 and is either riveted or welded so as to make an absolute gas-proof joint; in fact all of the joints are so constructed as to prevent gas or smoke from escaping and from passing into the outer casing 13.

In the inner compartment is placed acfirebox 14, which is arranged by first placing into the compartment a sheet metal shell 15, which extends upwardly to a height sufficient to provide a proper depth for the fire box. In this shell is supported the usual grate-bars 16, the bottom 17 of the shell forming the bottom of the ash-pit 18, this bottom being located a short distance above the bottom 11, so as to allow a reasonable space 19 for the circulation of hot air near the ash-pit 18, as well as to form a clean-out opening from which all sediment, such as dust or soot might be removed from the inner compartment.

This clean-out opening is provided with an inlet 20, provided with a door 21 through which access may be had to the compartment, the ash-pit 18 being provided with an inlet 22 provided with a door 23, through which the ashes may be removed from the ash-pit.

Against the shell 15 and above the grates 16, I place a lining 24 of fire-clay which forms the proper lining for the fire-box, and leading into the fire box is a fuel inlet 25, provided with a fire door 26.

The arrangement of the diving lines as will be observed extend from the top to the bottom and extend a reasonable distance above the top of the fire box so that all par ticles of combustion are directed to the openings of the diving flues and pass down through these openings to the bottom or base of the casing and then directed to the rear into the flue 27, from which it escapes through the outlet 28 into the chimney. The action is a down-draft arrangement and all the heat and particles of combustion must pass downwardly through the diving flues before reaching the chimney; and by. means of increasing the size of the diving flues from the rear to the front it equally distributes the heat within the chamber 29 which is formed between the inner compartment and the outer casing 13.

In order to prevent the excessive heat sides and front and also at the base.

and flame from burning through the portion 30 of the material from which the diving lines are constructed I place over the same and immediately upon top of the fire-clay, detachable flame shields 31 the structure of these are clearly shown in Fig. 4. It is preferably constructed of a casting so arranged as to conform with the shape of the portion 30 of the diving lines and is provided with a pair of depending projections 32 which pass down on the outside of the shell 15 against which the fire-clay is supported; and the edge or shoulder 33 resting upon the top of the same. This acts as a shield as well as a preventive from burning through the material at that point.

These shields may be arranged to suit by building the same any height desired, this greatly depends upon the general structure of the apparatus and the circulation of the heat.

On the top of the flue 27 and above the outlet 28, is an opening 3&- which is provided with a damper 35, the detail of construction being shown in Fig. 5. This damper is supported on brackets 36 located on the sides of the box, and the damper is controlled by the rod 37 (see Fig. 5) which passes through the flue casing and also through the outer casing but in a manner as that shown by dotted lines in Fig. 1. This damper is only used when starting a fire so as to give the fire a direct draft and when the fire has been properly started the damper is then closed and remains closed so as to direct all heat and particles of combustion downwardly before passing to the chimney.

One of the features of my invention is to provide a heat generating compartment to be centrally located in the outer shell so as to direct an even amount of heat at the rear, y this arrangement the pipes which lead from the openings 38 formed in the top of the outer casing 13, are provided with an equal amount of properly heated air and every room to be heated is properly provided with its share of heat.

It has been found that heaters of the present structure have the outer casing arranged eccentric to the inner compartment thereby some of the heat distributing pipes leading to the outer compartment are not properly provided with circulation and furthermore the present form of heaters direct their heat toward the rear and very little toward the front. This obstacle is dispensed with in my invention as the heat is equally distributed within the entire apparatus.

Having fully described my invention what I claim is:

A furnace of'the class described, compris ing an inner heating compartment consisting of a shell of sheet material bent and shaped to form a plurality of diving flues, a lining placed therein and covering a portion of said fiues, detachable flame shields placed on the top of the shell and against the contacting walls of the diving flues, a firebox located in said shell, an ash-pit below the fire box, an outer compartment incasing the inner heating compartment which inner compartment is located centrally therein, the diving fiues being arranged for equally distributing the heat in the entire outer compartment and for directing the heat downwardly passing under the base of the inner compartment before entering the chimney and a damper for permitting a direct draft to the fire-box when first kindling the fire, substantially as specified.

In testimony whereof, I have signed my name to this specification, in presence of two subscribing witnesses.

CHARLES I-IILLER.

WVitnesses:

ALFRED A. EIoKs, B. AUSTINE. 

